Carbureter.



N. C. STAMPS.

OARBURETER.

APPLICATION FILED FEB.13, 1911.

Patented June 25, 1912.

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Specification of Letters Patent.

Application filed February 13, 1911. serial No. 608,392.

To all whom it may concern:

Be it known that I, NATHANIEL Ghana/res, a citizen of the United States, residing at ..Ocea11 Park, in the countyof Los Angeles and State of California, have invented new and useful Improvements in. Carbureters, of

which the following is a specification.

T his invention relates to improvements in I carburcters forum in connection withgas engines, and is particularly adapted to use in connection with automobile gasolene engines, being adapted to feed a proper m1xture of air and gasoiene required by the operation of the engine.

It is an object of the invention to provide a carbureter mechanism in which the inflow of gasolene is capable of being augmented by the suction of the engine, in accordance with the demands made for gaseous mix tures in speeding up the engine.

It is a further object of the invention to provide a needle valve for regulating the inflow of gasolene which cooperates with the inflow of air produced by the suction of the engine.

In the accompanying drawing forming a part of [his specification, Figure l is a side elevation of the improved carbureter em' bodying the features of the present invention. Fig. 2 is an edge elevation of the same taken at right angles to the view of Fig. 1.

-'l*ig. 3 is a vertical central sectional. View taken through the carburetor upon the pl nne of the axis of the throttle valve, Fig. 4 is a similar verticalcentral sectional viewtaken through the valve mechanism, but at right angles to the plane of the section in Fig. Fig. 5 is a detail sectional view of a portion of the flout chamber of the carhui-cler, showing the valve controlled by the float. Fig. 6 is an enlarged detail sectional view of the said valve which is controlled 'dicates afloat chamber, 2. a mixing chamber,

dud 3 a, priming rcc'eptacle orpan. The

float chamber is of any usual or ordinary construction and is preferably made in an elongated rectangular form as shown in the drawing, and is connected with a gasolene supply as at 4, the gasolene being introduced into a small chamber 5 in one corner of the float chamber. The walls of the chamber 5 are provided with an aperture, surrounding which is a valve seat 6, which is adapted to be closed by a float controlled valve 7. Said valve 7 comprises a red as 8 having a beveled seat engaging end as 9, the said rod passing upwardly through a sleeve 10 in which it is adapted to be adjusted, the said rod having a screw threaded portion at 11 by which it may be moved to different positions with respect tothe said sleeve 10 by turning the upper end thereof. The said upper end of the rod is provided with a milled head 12 by which it may be turned and a locl' nut 13 mounted upon the rod and adapted to engage the upper end of the sleeve 10 is employed for securing the parts in the plates after they have been adjusted. The sleeve 10 projects through a-suitable packing gland as 14; in the top wall of the float chamber so that the milled head 12 and the lock nut 13 are outside of the float chamber and can be easily reached for adjusting the parts.

\Vithin the float chamber 1, a float 15 of ordinary construction is arranged, said float being carried by a lever 16 which is pivoted within the float chamber at 17. end oi the lever 16 is bifurcated as at 18 and engages parallel annular flanges 19, formed upon theoutcr periphery of the sleeve 10. The float is thus capable of raising or lowering the valve. to admit a required quan tity of gasolene to the float chamber in the usual. way. lhe float chamber is generally provided 'with a glazed window or. inspection opening as shown in section at the right hand side oi. Fig. 3.

From the lower end of the float chamber The outer Patented June 25, 1912.

an extension depends a sufficient distance to 7 connect with a passage 20 formed in a projection 21. extending from the float chamber which carries the priming pan 3. Extending upwardly from the central portion of the priming pan 3 is a needle valve mechanism the fixed inner tubular port-ion 22 of which is secured in the outlet of the passage 20 and is thus arranged in the center of the pan 3 as elearlylillush-ated in Fig. 3. The upper end of the said tubular portion 22 ex- 26 is formed with an annular beveled valve in entering the mixing chamber.

beyond the tubular portion of the sleeve and a mechanism connected with the air supply pered so that when it is lifted fronithe end for starting the engine and running it at a tends into the lower part of the mixing; chamber casing 2. Movabl y mounted on the said tubular member 22 is a needle carrying sleeve 23.which loosely tits upon the member 22 and is provided at its upper end with a yoke extension 2st .extending some distance carrying a depending needle as adapted to extend downwardly into the open end of the tubular member 22. The needle 25 1s taof the tube 22 a greater quantity of gaso lene can flow from said tube thanwhen the needle is de ressed.

The need e is preferably made so as to not quite close the end of the tube and thus a small quantity of gasolene can always be drawn through the needle valve mechanism low speed. When the engine runs at a high speed the needle valve is lifted by means of for the carbureter,,as will be hereinafter. fully described. Above the pan 3 and with ample space between it and the said pan for the entrance of all the air supply that will be required in the mixing chamber, is a depending cylindrical casing 26 which is cured into the lower open end of the mixing chamber 2. The upper end of this casing seat 27 upon which rests a movable air controlling member or thimble 28. The said thimble 28 is provided with aiiaring upper; end, the outer beveled surface thereof being adapted to fit upon the seat 27 for closing the air supply at that point. The central portion of the thimble is open from end to end and the elongatcd body portion thereof is cylindrical in form, so as to fit within a (:ylin drical sleeve bearing 29 spaced within the casing 26. The central portion of the thinible is somewhat contracted interiorly for a port-ion of its length to fit closer upon the needle valve than the other portions of the thimblc. A sutlicicnt air space is left, however, at its contracted portion and around the needle valve, to admit a proper amount of air through the t-himhle to mix with the gasolene introduced, for startingl and running the engine at a low speed. An I annular passageway is formed between the casing 26 and the inner sleeve bearing 29 through which additional air can be sup-v plied to the mixing chamber 2 when the thinible 28 is'lifted up from the seat 27. The space between the saidcasing 26 and the sleeve 29 is preferably-provided with spirally arranged partitions as at 30 for giving the air a whirling or twisting movement The movement of the thimble 28 and the needle'valvc sleeve 23 are so connected that when the suction of the engine, upon being speeded up, draws in such quantities of air the said slot being made of ample length to permitthe thirnble to move to the desired extent. The outer end of the said-arm 31 has adjustably secured thereto a loop 33, the said loop being adapted to have a sliding, engagement with the upper end of anarm 3% which is secured'to a rock shaft 35 which journaled upon the framing of the carbureter. The upper end of said arm 34 preferably carries an anti-friction roller 36 which engages the said loop 33 without undue friction.

The rock shaft 35 is usually journaled in a projecting support 35 arranged between the float chamber and the needle valve mechanism, and the said rock shaft at a point opposite said needle-valve mechanism is provided 'with a bifurcated lever as 37. The ends of the bifurcated lever 37 are providcd with. inwardly projecting pins 38 which engage an annular groove 39 formed upon the outer surface of the'slcevc The rocking, of the lever is thus capable of 9 lifting the said sleeve. The said lever and the rock shaft 235 carrying the same are rocked whenever thethimble 28 is lifted by the suction of the engine. nce the loop 33 is carried upwardly by the said thimble. It. ,will be readily understood that by setting the loop 33 at a greater or less angle with respectto the thinible. the needle carrying; sleeve 2 will be raised to a greater or degree. The said loop is therefore adjusted for supplying the right amount of gasolene for the higher speeds of the engine, and 2 the introduction of said gasolene around'the valve 25 will be. controlled automatically by the movement of the t-himble 28 which responds to the suction of the engine.

ln the upper end of the mixing chamber 2 the usual throttle valve 4-0 is pivotall) mounted, the stem of said valve extending outside of the casing and being provided with an operating arm 41' which may be connected with any portion of the automobile or other. mechanism as desired so as to be within easy control. of the operator.

In using the carburetor the Boat valve is manipulated in the usual way for intrclucing a greater quantity of gasolene t-h n usual so that some of it will run into th pan 3 from the needle valve. In this way the carburetor is primed; for starting the engine. hen the engine has been started the needle valve will supply an ample quani tity of gasolene for the running of the-ere gine at low speed when the himble is seated tity of air through the casing 26 an upon the valve seat 27, and a corresponding amount of air being allowed to pass through thewcentral portion of the thimble. When the engine is speeded up the suction thereof in drawing the gaseous mixtures through the carbureter will be correspondingly increased andthe thimble 28 will be lifted from its seat for introducing a greater nanthe ioop 33 will rock the shaft 35 so as to lift the needle and introduce :1 correspond ingly amount of gasolene for maintaining the right mixture within the chamber 2. It will be readily understood that after the parts are once adjusted for the low *ed and the high speed action of the en ine, the feeding of proportionate amounts of gasolene and air will be automatically accomplished.

What I claim is 1. A carbureter comprising a mixing chamber having inner and outer air inlet passagesa movable air controlling thimble mounted in said chamber and having a centralair passage and adapted to control the passage of air through said inner and outer passag s, the said outer passage having inclined air directing partitions therein, a gasolenc valve mechanism projecting into said inlet, and adjustable means for connectan; the same with the movable air controlling thimble for increasing the feed of gasolen'a when the air supply is increased.

2'. A carbureter mechanism comprising a mixing chamber having an air inlet formed with acentral air passage and an outer air passage surrounding the same, a movable air controlling thimble mounted in the inner passa 'e and adapted to control the err trance of'air through the outer air passage, a needle valve projecting downwardly into said thimble, and having connections with the gasolene supply, a lever mechanism adapted to open the needle valve to a greater 3. A carbureter mechanism con'iprising a mixing chamber having an air supply passage-way, and a hollow movable thimble mounted therein capable of permitting the entrance of air through its hollow portion and also capable of controlling the entrance of additional air outside its hollow portion, a needle valve mechanism projecting into said air inlet comprising a tubular portion, a sleeve mounted thereon, a tapering valve carried by said sleeve and adapted to enter the end of the tubular portion, a rock shaft for moving said sleeve, a lever for rocking said shaft, and an adjustable member carried by the thimble and capable of actuating the said lever for controlling the supply of gasolene through the valve mechanism in accordance with the movement of the thimble.

4. 'A carbureter mechanism comprising a mixing chamber, an air inlet casing mounted thereon, a movable hollow thimble arranged within said casing and controlling the air supply, a float chamber mounted upon said casing for introducing a gasolene supply to the carbureter, a priming pan mounted on the float chamber, and having a passageway formed therein communicating with said float'chamber, a needle valve mechanism carried by the priming pan and connected with the said passage-way therein, said needle valve mechanism projecting into the air inlet of the carbureter, a valve carrying sleeve movably mounted on the valve mechanism provided with a depending tapering needle for lifting or depressin the needle, an arm for rocking said shalt, an adjustable loop secured to-the said thimble and engaging said arm, the movement of the thimble in introducing more air under the suction of the engine thus being capable of operating the needle valve to introduce a corresponding quantity of gasoleue.

In Witness that I claim the foregoing I have hereunto subscribed my name this 2nd day of February, 1911. i

N. C. STAMPS. I

W'i tnesses Enrrn STAD'IM'AN, EARLE R. loLLAao. 

